Paper-making machine



Sept. 28 1926. 1,601,387

H. G. CRAM I PAPER MAKING MACHINE Filed July 2, 1923 2 Sheets-Shet 1 a P i ITIUGI77OI.

Sept. 28 1926. 1,601,387

- H. G. CRAM I PAPER MAKING MACHINE Filed July 2, 1923 2 Sheets-Sheet 2 Ir? verzToh N N J T/ I i atented Sept. 28, 1926.

iJNiTED STATES PATENT orrice.

E'ERVEY GHCBAE, 0F MILLINOCKET, MAINE, ASSIGNOR TO GREAT NORTHERN I APE R GOMPANY, OF MILLINOCKET, MAINE, A CORPORATION OF MAINE.

PAPER-MAKING MACHINE.

Briefly the-invention consists in directingblasts of air or other suitable fluid from opposed-nozzles beneath the lead strip on a drying roll at about a point on the drying roll where the paper web leaves the roll to pass to the adjacent roll in the normal operation of the machine. Said nozzles are arranged to direct the opposing air blasts forwardly in the directionof movement of 4 the lead strip and at such an angle with blast nozzles;

each other that the opposing jets strike against the opposite side edges of the lead strip a substantial distance ahead of the nozzles and detach the lead strip from the drying roll to which it may be adherent and meet beneath the lead strip and combine and pass as a single blast of air beneath the lead strip and in a direction to support and assist the momentum of the lead strip in conveying it onto the next drying roll of the series. With this arrangement of the opposed air blasts, the lead strip may be removed from a drying roll in the space between it and the next roll of the series and. consequently, the length of the end of the lead strip as it passes between the two drying rolls is or may be short.

The invention further contemplates positive means to remove the lead strip from the drying roll, if the lead strip should happen to pass the opposed air blasts without being detached from the drying roll, and said means may include a doctor positioned on the'drying roll ahead of the opposed air and said doctor may have means to provide an air blast opposed to the direction of movement of the lead strip whereby to force the paper web to pass to the next drying roll. Said air blast and the opposed air blasts are preferably arranged to act in opposition and at such an angle, assisted by the backing effect of the drying roll, as to direct a combined air stream toward the next drying roll and 192's. S erial no. 648,985.

direct and support and assist in moving the lead strip to the next drying roll.

A further object of the invention is the provision of means by which the air blasts for all the rolls may be'turned on at the same time by an operative located at any set of drying rolls provided with air-blast nozzles; and also by which each air blast may be controlled independently of the other air blasts.

1 is a perspective detail of a drying s-ectlon of a paper making machine with my invention associated therewith.

2 is a side View of the drying section.

Flg. 3 1s a perspective detail illustrating the action of the opposed air blasts.

Fig. 4, is an enlarged side detail of an air blast nozzle.

Fig. 5 is an enlarged plan detail of the nozzles.

Fig. 6 is a perspective detail illustrating the manner in which the control valve for an air-blast may be controlled.

As here shown, the invention is applied to the paper making machine having the up per bank of drying rolls or driers 10 and the lower bank of driers 11 which are staggered with relation to the upper bank of driers, although the invention is equally applicable to banks of vertically arranged driers. The usual upper felt 12 and lower felt 13 are or may be associated with the upper and lower banks of driers, respectively, and the lead strip and utlimately the full width of the paper web is passed first over the baby drier 1 4 between the lower felt 13 and the first right hand end lower drier 11 and thence upwardly over the first upper drier 10 and so on through the drier section of the machine.

Preferably nozzles for opposed air blasts are associated with each drier of the lower bank and all are connected to receive air or other suitable fluid at suitable pressure "from the common supply pipe 15 which may extend along the. length of the drier section. Each set of nozzles may be controlled by its valve 16 and all of said valves may be interconnected by suitable means, as the operating rod 17 extended between said valves, whereby all of said blasts may be operated together, or any valve may be operated. independently of the others by providing a suitable connection, hereinafter to be described, between the movable member of the valve and said operating rod.

The means for providing the opposed air blasts for each drier may include the-pipe 20 which may be suitably connected, as by the flexible pipe 21, with the supply. pipe 15 through the control valve 16. Said pipe {20 is extended into the space between and in front of successive upper and lower driers and adjacent the lower drier from which the lead strip is to be removed and 13 provided with two branches 22 and 23 which are extended forwardly in the direction of travel of the lead strip and are adapted to movement of the lead strip and against the opposite side edges of the lead strip and also against the lower drier, so as to pass under the lead strip and raise and detach it from the lower drier, to which it may be adherent.

Preferably, said nozzles are inclined to direct blasts of air forwardly at a considerable angle, say about with said branches 22 and 23 although the precise angle which the,

air blast may make with its branch pipe may be varied when desired. Said 0 posed air blasts are arranged to meet un er the lead strip and combine in a single blast which, by reason of the forward inclination of said nozzles 24 and 25, passes forward in the direction of travel of and under the moving lead strip and acts to support itand assist in conveying it from the lower drier to the succeeding upper drier. The action of said air blasts is illustrated more particularly in Fig. 3.

Said nozzles are arranged to direct their air streams forwardly in the direction of movement of the lead strip to engage and meet under the lead strip at substantiall its normal point of take-off from the ier whereby the length of lead strip to be supported and guided to the next upper drier is short and the lead strip is the more easily and positively supported and guided.

Inasmuch as the condition of the paper, when wet, is not uniform, the lead strip may have the tendency to stick to the driers, and I prefer to provide means including doctors to force the paper to take the proper direction to pass between successive driers. Said doctors are arranged preferably at about the highest point of the lower driers 11, and as many driers as desired may be provided with said doctors. Said doctors are'arranged to scrape off or remove the paper web or the lead strip from the lower driers to which, it may be adherent. Air

ing action of the lower drier,

scones? pipes 27 are associated with said doctors and extend along the length thereof and are provided with apertures or orifices 28 by means of which jets of air may be directed in a direction contrary to the direction of movement of the bottom driers, or the paper thereon, whereby to engage and force the paper upward so that it will invariably pass upward and between the top felt and the next top drier. The jets issuing from said pipe 27 are arranged to flow in a direction opposite to and encounter the combined stream from the opposed air-blast nozzles 24 and 25 and combine with said stream; and the combined stream, assisted by the backasses upwards in a direction to carry and guide the paper between the upper feltand the next upper drier.

Said pipe 27 may be connected to the main air suppl pipe'15 through the control valves 16 whereby all air blasts may be turned on simultaneously to cause the lead strip to pass between successive driers automatically.

In accordance withthis invention, means are provided whereby an operative located at any particular set of driers provided with air blasts may turn on the air blasts of all the driers at the same time, and said means may be arranged also so that each air blast may be controlled independently.

For this purpose, the operating rod 17, which is arranged to control the air blasts, is or may be'extended between all of the control valves 16. Each valve ,16 may be provided with a handle 30 and said rod 17 may be provided with :1 lug or abutment 31 for each handle. Said rod and lugs are preferably arranged to be free from positive connection with said valve-handles 30 and to engage said handles and move them in one direction only, as in a direction to open the valves, as illustrated'in Figs. 2 and 6, and said rod may be moved in the opposite direction without closing the valves. Said rod 17 is adapted to be grasped and operated by an operative located at any point along the length of the machine and adjacent said rod, wherebyall air blasts may be turned on at the same time at. any point along the driers. Inasmuch as the rod is free from positive connection with the valvehandles, each air blast 'may be turned off by the operative independently of the other. If desired, ,all valves may be turned on at the s'ame'time from one'end of the drier banks bmeans of'the handle 34 which .is or may e pivotally supported and arranged in loose engagement with said rod 17.

I claim:

1. In a paper-making machine, the combination of-upper and lower rolls for the paper web, and means includin nozzles disposed in front of said mils and arranged to deliver blasts of air directed in the direction of travel of the lead strip of the paper web and against the opposite side edges of the lead strip ahead of the nozzles which act to lift the lead strip free from contact with its supporting roll.

2. In a paper-making machine, the combination of upper and lower rolls for-the paper web and means including nozzles disposed in front of said rolls and arranged to deliver blasts of air directed in the direction of travel of the lead strip of the paper web and against the opposite side edges 0' the lead strip ahead of the nozzles which act to lift the lead strip free from contact with its supporting roll, said nozzles also arranged to combine their air blasts, under the lead strip in a single jet which moves in the direction the lead strip is to take and which acts to support the lead strip in its passage between the rolls.

3. In a aper-making machine, the combination of upper and lower driers forthe paper web, and means including nozzles disposed in front ofsaid driers and arranged to deliver blasts of air forwardly'in the direction of travel of the lead strip of the paper web and downwardly onto the lower" driers drier and against the opposite side edges of the lead strip .on the lower drier ahead of the nozzles which act to raise and detach the lead strip free from the lower drier and support it in its passage to the upper drier,

4. In a paper-making machine, the combination of upper and lower driers for the paper web, and means including nozzles arranged to deliver blasts of air forwardly in the direction of travel of the lead strip of the paper web and downwardly onto the lower drier and against the o posite side edges of the lead strip ahead 0 the nozzles which act to lifit the lead strip free from the lower drier and combine under the lead strip in a single jet which moves in the direction the lead strip is to take to support the lead strip in its passage between the driers. 5. In a paper-makin machine, the combination of upper and Iower driers for the paper web, and a device for taking off the lead strip of the paper web from a drier, comprising piping andtwo nozzles connected therewith disposed in front of the driers, said nozzles disposed on opposite sides of the path of the leadcstrip'and directed toward each other and also forwardly in the direction of movement of the lead strip whereby to direct two blasts of air which may strike the opposite sides of the lead strip forward of the nozzles and between the and at about the point of take-01f of the lead strip from the drier to which it is adherent.

6. In a paper-makin machine, the combination of up er and ower driers for the paper web, an a device for taking oil the said nozzles disposed on opposite sides of the path of the lead strip and directed towards each other and also forwardly in the direction of movement of the lead strip whereby to direct two blasts of air which may strike the opposite sides of the lead strip and downwardl onto the lower drier forward of the nozz es and between the driers and at 1 about the point of take-0E of the lead strip from the drier to which it is adherent and combine under the lead strip in a single jet which moves in the direction the lead strip is to take and supports it during its passage between the driers. a r,

I In a'paper-making machine, the combination of a support for the paper web, and means to direct blasts of air in the direction of movement of; and angularly toward the lead strip whereby to impinge against the opposite side edges of the lead strip and raise and detach it frdin the support to which it may be adherent.

8. In a paper-making machine, the combination of a support for the paper web, and means to direct a blast of air in the direction of movement ot the lead strip of the paper web and between the lead strip and the support whereby to raise the lead strip and detach it from the support.

9. In a paper-making machine,'the combination of a support" for the paper web, and means to direct a blast of air in the direction ofmovement of the lead strip of the paper web and angularly toward the lead stripand between the lead stri and the support whereby to raise the lead strip and detach it fromthe support.

10. I11 a-paper-makin machine, the combination of upper and ower driers for the paper web, means to direct blasts of air forwardly in the direction 015 movement of the lead strip of the paper web and against the opposite side edges of lower drier and a doctorengaging said lower drier forward of the point of take-off of the-lead strip therefrom having means to direct blasts of air against the lead strip to direct it to pass to the upper drier.

11. In a paper making machine, the com bination of upper and lower driers for the paper web, means to direct blastsof air forwardly in the direction of movement of the lead strip of the'paper webvand against the opposite side edges of the lead strip on the the lead strip on the lower drier and positive removal means for the lead strip engagin the lower drier forward of the point 0 take-ofi of the lead strip therefromhaving means to direct blasts of air in a direction opposed. to the movement of the lead strip whereby to direct it to pass to the uppendrier. i v

12. Ina paper-makingnnachine the combination of upper and lower driers for the paper web, means to direct blasts of air forwardly in the direction of movement of the lead strip of the paper web and against the opposite ed s of the lead strip on the lower drier and dztach the lead strip from the drier and pass forwardly beneath the leadstrip, and means to direct blasts of air against said forwardly moving blasts of air above the lower drier and beneath the lead strip whereby to direct the lead strip upwardly to the upper drier.

13. In a paper-making machine, the combination of a row of upper and lower rolls about and between which the paper web is adapted to pass, means to transfer the paper Web from one roll .to another including air-blast nozzles arranged at the-rolls, and means to control all air blasts from a position adjacent any air blast nozzle.

14. In a paper making machine, the combination of a row of upper and lower rolls about and between whlch the paper web is adapted to pass, means to transfer the paper web from one roll to another including airblast nozzles arranged at the rolls, and means to turn on all air blasts from a position adjacent any air blast nozzle, said means constructed and arran ed to permit each air blast to be turned 01% independently of any other air blast.

ooms? 15. In a paper-making machine, the combination of a row of upper and lower rolls about and between WhlCh the paper web is adapted topass, means to transfer the paper web from one roll to another including airblast nozzles arranged at the rolls, and valves to control said .air blasts, said valves having handles, and means to control all air blasts at the same time includin an operating rod extended between sai valves and having a loose connection with the handles thereof.

16. In a paper-making machine, the combination of a row of upper and lower rolls about and between WhlCh the paper web is adapted to pass, means to transfer the paper web from one roll to another including airblast nozzles arranged at the rolls, and valves to control said air blasts, said valves having handles and means to control all air blasts at the same time includin an operating rod extended between sai valves and having abutments free from positive connection with said handles and arranged to be moved in one direction into engagement with said handles, whereby to open all of said valves and turn on all air blasts, eachvalve arranged to be closed independently.

In testimony whereof, I have signed my name to this specification.

. HERVEY G. CRAM. 

